29_un21 - Lua

Introduction

29_un21 is a Lua library that provides utility functions for working with Unicode characters and strings. Lua lacks native support for Unicode, so this library is intended to fill that gap.

The library is designed to be lightweight and efficient, and is compatible with Lua 5.1, 5.2, and 5.3.

Features

The main features of 29_un21 are:

• Functions for working with individual Unicode characters, such as utf8.decode and utf8.encode.
• Functions for working with Unicode strings, such as utf8.len, utf8.sub, and utf8.reverse.
• Functions for handling Unicode normalization, such as unicode.normalize and unicode.combining.
• A set of Unicode character tables that can be used for various purposes, such as character classification.
• A command-line utility for testing and exploring the library.

Usage

To use 29_un21, simply include the library in your Lua code:

local utf8 = require("29_un21.utf8")

Once you have included the library, you can use its functions like this:

local str = "𝔸𝕓𝕔"
print(utf8.len(str))  --> 3
print(utf8.sub(str, 2, 3))  --> "𝕓𝕔"

Examples

Here are a few examples of how you might use 29_un21 in your own Lua programs:

Counting Characters

local utf8 = require("29_un21.utf8")

local str = "𝔸𝕓𝕔"
local len = utf8.len(str)

print("Number of characters: " .. len)  --> "Number of characters: 3"

Reversing a String

local utf8 = require("29_un21.utf8")

local str = "𝔸𝕓𝕔"
local rev = utf8.reverse(str)

print("Reversed string: " .. rev)  --> "Reversed string: 𝕔𝕓𝔸"

Normalizing a String

local unicode = require("29_un21.unicode")

local str = "nöêl"
local nfc = unicode.normalize(str, "NFC")

print("NFC: " .. nfc)  --> "NFC: nöêl"

Conclusion

29_un21 is a powerful and flexible library for working with Unicode characters and strings in Lua. Whether you need to parse text, count characters, or normalize strings, this library has you covered.

If you work with Lua and Unicode, you owe it to yourself to give 29_un21 a try!